CN103873954A - Method of embedding invisible digital watermarking into streaming media, and apparatus and system thereof - Google Patents
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- CN103873954A CN103873954A CN201210540233.1A CN201210540233A CN103873954A CN 103873954 A CN103873954 A CN 103873954A CN 201210540233 A CN201210540233 A CN 201210540233A CN 103873954 A CN103873954 A CN 103873954A
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Abstract
The embodiment of the present invention provides a method of embedding invisible digital watermarking into streaming media, and an apparatus and a system thereof. The method mainly comprises the steps of: utilizing a public key cryptosystem to generate a public key and a private key in pairs, and using the private key to perform signature processing on watermarking information data to obtain a signature value; cascading the identification of a streaming media file with the public key and the signature value and obtaining the watermarking embedding position in each non-critical frame of the streaming media file through a Hash algorithm; and successively embedding the watermarking information data into the watermarking embedding position in each non-critical frame by a sending terminal in dependence on a set information embedding rule. According to the embodiment of the invention, under the condition of not influencing user visual experience, the sending terminal embeds the signature value of the watermarking information into the streaming media through the public key cryptosystem, and a receiving terminal analyzes the signature value of the watermarking information in the streaming media, thereby realizing tracing and protection of the copyright of the streaming media.
Description
Technical field
The present invention relates to watermark embedded technology field, relate in particular to and a kind ofly will lose digital watermarking and be embedded into the methods, devices and systems of Streaming Media.
Background technology
Along with the fast development of Internet, problem of piracy is serious all the more, reviewing pirate in the situation that, there is no particularly preferred way, and the most frequently used way is to stamp in the media a mark.Common mode is to stamp " XX satellite TV " or " XX net " in the upper left corner of film or the upper right corner, prove that these media are that this satellite TV or this XX net are all really although do like this, but also bring two other problem: after marking, affected the quality of original film simultaneously; Secondly, a lot of pirated disc copiers do mosaic processing in mark, then can pirately use these films in the same old way.So need to solve two problems, embedding information should not have influence on watching of film, secondly, if pirated disc copier eliminates these secret informations, need to carry out a large amount of changes to the coding of film, causes film deleterious, does and loses more than gain like this.
Therefore, developing a kind of is very necessary by the method that loses digital watermarking and be embedded into Streaming Media effectively.
Summary of the invention
Embodiments of the invention provide a kind of and will lose digital watermarking and be embedded into the methods, devices and systems of Streaming Media, will lose digital watermarking and be embedded into the method for Streaming Media to realize effectively.
To lose digital watermarking and be embedded into a method for Streaming Media, comprising:
Utilize public-key cryptosystem to generate a pair of PKI and private key, use described private key to the processing of signing of the data of watermark information, obtain signature value;
By the mark of files in stream media and described PKI, signature value with carry out cascade, by Hash calculation, obtain the watermark embedded location in the each non-key frame of described files in stream media;
According to the information embedding method of setting, transmitting terminal is embedded into the data of described watermark information on the watermark embedded location in described each non-key frame successively.
To lose digital watermarking and be embedded into a device for Streaming Media, comprising:
Signature value acquisition module, for utilizing public-key cryptosystem to generate a pair of PKI and private key, uses described private key to the processing of signing of the data of watermark information, obtains signature value;
Watermark embedded location acquisition module, for by the mark of files in stream media and described PKI, signature value with carry out cascade, by Hash calculation, obtains the watermark embedded location in the each non-key frame of described files in stream media;
Embed processing module, for according to the information embedding method of setting, the data of described watermark information are embedded into successively on the watermark embedded location in described each non-key frame at transmitting terminal.
To lose digital watermarking and be embedded into a system for Streaming Media, comprising:
Described device and receiving terminal, described device is transmitting terminal,
Described receiving terminal, for according to the identical processing procedure of transmitting terminal, by Hash calculation, obtains the watermark embedded location in the each non-key frame of described files in stream media according to the mark of described files in stream media and described PKI, signature value;
According to the watermark embedded location in the each non-key frame of the information embedding method of described setting and described files in stream media, parse the watermark information embedding on the watermark embedded location of each non-key frame of described files in stream media.
The technical scheme being provided by the embodiment of the invention described above can be found out, the embodiment of the present invention is based upon public-key cryptosystem, on Streaming Media and image disposal system, set up a reliable Mathematical Modeling by statistical method, realize the visual experience in the case of not affecting user, transmitting terminal is embedded into the signature value of watermark information in Streaming Media by public-key cryptosystem, and receiving terminal is by signature value dissection process from Streaming Media of watermark information.Realize the reviewing and protecting of copyright of Streaming Media.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 a kind ofly will lose digital watermarking and be embedded into the handling process schematic diagram of the method for Streaming Media for what the embodiment of the present invention one provided;
Fig. 2 a kind ofly will lose digital watermarking and be embedded into the structural representation of the device of Streaming Media for what the embodiment of the present invention two provided;
Fig. 3 a kind ofly will lose digital watermarking and be embedded into the structural representation of the system of Streaming Media for what the embodiment of the present invention two provided.
Embodiment
For ease of the understanding to the embodiment of the present invention, be further explained explanation below in conjunction with accompanying drawing as an example of several specific embodiments example, and each embodiment does not form the restriction to the embodiment of the present invention.
Embodiment mono-
This embodiment provides a kind of by lose digital watermarking be embedded into Streaming Media method handling process as shown in Figure 1, comprise following treatment step:
RSA public-key cryptosystem at present application is more universal, comprises a PKI and a private key, and PKI is disclosed, private key need to be keep secret.Can sign to data by private key, utilize PKI can verify this signature value, realize the non-repudiation of signature.
Utilize RSA Algorithm to generate a pair of public private key pair, PKI is open to everyone, and private key is maintained secrecy.Read the binary data of the watermark information that need to embed in Streaming Media, above-mentioned watermark information can be picture or Word message.Use hash algorithm to carry out Hash processing to the binary data of above-mentioned watermark information, obtain cryptographic Hash.Above-mentioned hash algorithm can be SHA(Secure Hash Algorithm, Secure HashAlgorithm) 1 method etc.
At transmitting terminal, utilize above-mentioned private key to the cryptographic Hash processing of signing, obtain signature value.
FFmpeg is a set of record, converted digital audio, video of can being used for, and digital audio, video can be converted into the multimedia video handling implement of stream.FFmpeg has very powerful function, comprising: video acquisition function, video format conversion, video capture, to video with watermark etc.For example, FFmpeg can change into the flv form that present video website adopts by the video avi under shooting with video-corder etc.
The embodiment of the present invention utilizes FFMPEG to read needs watermarked files in stream media, and above-mentioned files in stream media can be local file, can be also real-time live broadcast stream media, and the form of above-mentioned files in stream media can be flv, mp4, avi or extended formatting.
Utilize FFMPEG to resolve above-mentioned files in stream media, obtain key frame I frame and non-key frame P frame or B frame.Because, for most live TV stream, there is no B frame, consider the versatility of embed watermark information, the non-key frame P frame of unified employing is processed.
YUV is a kind of colour coding method, and Y represents luminance signal, and U, V represent carrier chrominance signal.Because the Y component in YUV component is luminance component, visual impact to people is larger, and in order to guarantee the quality of Streaming Media, the embodiment of the present invention is only done the embedding of digital watermarking on U component or V component, below, the embodiment of the present invention is described as example to unify choice for use U component.
DCT(Discrete Cosine Transform, discrete cosine transform) refer to and convert one group of light intensity data to frequency data, to obtain intensity variation situation.At transmitting terminal, the U component of each the non-key frame P frame to files in stream media carries out discrete cosine transform conversion, obtains matrix U
1, U
2..., U
m, wherein, matrix U
1corresponding first P frame P[1], matrix U
2corresponding second P[2] frame, matrix U
mcorresponding M P[M] frame.The row, column of above-mentioned matrix U can be 816,32,64 etc.
The concrete embedded location that calculates watermark by hash algorithm, carries out cascade by the mark of above-mentioned PKI, signature value and files in stream media, then carries out hash calculating, obtains the character string S of a special value byte:
S=Hash (PubKey|Signature|FileID) formula 1
Wherein, PubKey represents PKI, and Signature represents signature value, and FileID represents file identification; Above-mentioned special value determines according to concrete hash algorithm, such as can be 32.
Calculate the watermark embedded location P in the each non-key frame P frame of described files in stream media according to described S:
P[t]=(S[t]/N+a, S[t] modN+a) t=1,2 ..., M, formula 2
Described M represents the figure place of described character string S, described S[t] represent the t position of described character string S, described N is for setting positive integer, described a is according to mathematical statistical model and definite threshold value, described P[t] be t non-key frame.
Above-mentioned threshold value a can regulate by mathematical statistical model, and a is the parameter of an engineering properties, need between picture quality and robustness, do a balance, and a is less, and robustness is larger, but also larger to the quality influence of image; A is larger, and robustness is less, but also less to the quality influence of image.Experiment showed, that through a series of mathematical statistical model it is comparatively suitable that a selects between 4-6.
Such as, above-mentioned N is 16, above-mentioned M is 32, supposes and embeds character ' w ', and binary form is shown " 01110111 ", the method that embeds w is as follows, according to S[1] calculate the watermark embedded location of the 1st frame, suppose the S[1 of 16 systems]=0x78, according to above-mentioned formula 2, the watermark embedded location of the 1st frame is (7+4,8+4).
For above-mentioned the 1st frame, because watermark embedded location is (11,12), to U
1[11,12] this element is modified.Information embedding method in this embodiment is:
In the time that embedding information is 1, U
1[11,12] >=0, remains unchanged, if U
1[11,12] <0, negate; In the time that embedding information is 0, if U
1[11,12] >0, negate, otherwise remain unchanged.Be that nonnegative number represents 1, negative number representation 0.
In actual applications, above-mentioned information embedding method can also be other rule.Such as, by above-mentioned embedding information 1 and 0 respectively corresponding embedding method exchange mutually.
Subsequently, we at the 2nd frame according to S[2] calculate new watermark embedded location, ' 1 ' that embeds information bit in new watermark embedded location.Each two field picture only embeds 1 information.The complete character of embedding needs 8 two field pictures.In whole film, the binary data of watermark information is repeated to embed.
Then, at receiving terminal, can utilize the PKI of above-mentioned transmitting terminal to verify above-mentioned signature value, obtain watermark information, the watermark information that checking is obtained and the watermark information of above-mentioned dissection process compare, if both are consistent, determine that the above-mentioned watermark information parsing belongs to that transmitting terminal sends really, review and the effect of copyright mark thereby played copyright.
Embodiment bis-
This embodiment provides a kind of by lose digital watermarking be embedded into Streaming Media device concrete structure as shown in Figure 2, comprise following module:
Signature value acquisition module 21, for utilizing public-key cryptosystem to generate a pair of PKI and private key, uses described private key to the processing of signing of the data of watermark information, obtains signature value;
Watermark embedded location acquisition module 22, for by the mark of files in stream media and described PKI, signature value with carry out cascade, by Hash calculation, obtains the watermark embedded location in the each non-key frame of described files in stream media;
Embed processing module 23, for according to the information embedding method of setting, the data of described watermark information are embedded into successively on the watermark embedded location in described each non-key frame at transmitting terminal.
Concrete, described signature value acquisition module 21, specifically for using hash algorithm to carry out Hash processing to the binary data of described watermark information, obtains cryptographic Hash, utilizes described private key to the cryptographic Hash processing of signing, and obtains signature value.
Concrete, described watermark embedded location acquisition module 22, specifically for the mark of described PKI, signature value and files in stream media is carried out to cascade, then carries out hash calculating, obtains character string S:
S＝Hash(PubKey|Signature|FileID)
Described PubKey represents PKI, and described Signature represents signature value, and described FileID represents file identification;
Calculate the watermark embedded location P in the each non-key frame P frame of described files in stream media according to described S:
P[t]=(S[t]/N+a, S[t] modN+a) t=1,2 ..., M, formula 2
Described M represents the figure place of described character string S, described S[t] represent the t position of described character string S, described N is for setting positive integer, described a is according to mathematical statistical model and definite threshold value, described P[t] be t non-key frame.
Concrete, described embedding processing module 23, specifically at transmitting terminal, the U component of each the non-key frame P frame to files in stream media carries out discrete cosine transform conversion, obtains matrix U
1, U
2..., U
m, wherein, matrix U
1corresponding first P frame P[1], matrix U
2corresponding second P[2] frame, matrix U
mcorresponding M P[M] frame;
For first P frame P[1 of described files in stream media], the P[1 that calculates of design] watermark embedded location be (a, b), when first binary data of the described watermark information embedding when needs is 1, work as U
1[a, b] >=0, U
1[a, b] remains unchanged, and works as U
1[a, b] <0, U
1[a, b] negate; When first binary data of described watermark information embedding when needs is 0, work as U
1[a, b] >=0, U
1[a, b] negate, works as U
1[a, b] <0, U
1[a, b] remains unchanged;
For second P frame P[2 of described files in stream media], the P[2 that calculates of design] watermark embedded location be (c, d), when second binary data of the described watermark information embedding when needs is 1, work as U
2[c, d] >=0, U
2[c, d] remains unchanged, and works as U
2[c, d] <0, U
2[c, d] negate; When second binary data of described watermark information embedding when needs is 0, work as U
2[c, d] >=0, U
2[c, d] negate, works as U
2[c, d] <0, U
2[c, d] remains unchanged;
Repeat above-mentioned processing procedure, until described M the binary data that needs the described watermark information embedding is inserted in M P frame of described files in stream media successively.
This embodiment provides a kind of by lose digital watermarking be embedded into Streaming Media system structure chart as shown in Figure 3, transmitting terminal 31 and receiving terminal 32, the concrete structure of described transmitting terminal 31 as shown in Figure 2 above.
Described receiving terminal 32, for according to the identical processing procedure of transmitting terminal, by Hash calculation, obtains the watermark embedded location in the each non-key frame of described files in stream media according to the mark of described files in stream media and described PKI, signature value;
According to the watermark embedded location in the each non-key frame of the information embedding method of described setting and described files in stream media, parse the watermark information embedding on the watermark embedded location of each non-key frame of described files in stream media.
The embodiment of the present invention is suitable for files in stream media arbitrarily, is suitable for asymmetric cryptographic algorithm arbitrarily, comprises RSA Algorithm, ECC algorithm, and hash algorithm, except SHA1, also can adopt other hash algorithms such as MD5.
Such as, single image being done to emulation with matlab, threshold value a is chosen as 2,3,4 ... 10, eight groups of experiments altogether, threshold value is 2,3,4 o'clock, the color of image had deviation, threshold value obtains (value is 10) when larger, and deviation has appearred in the positive and negative relation of U1 element, has 2 sub-pictures and original image inconsistent in 100 sub-pictures, and in the matrix of this 2 sub-picture, also only have 1 data to occur deviation, become negative by positive number.
Our selected threshold is 6 to carry out the test of film.The trailer that we choose " transformer 2 " is used as testing film, repeats to add and extract watermark experiment.Threshold value a is chosen as 6,2 points of this film durations 31 seconds.Embedding information is character string " watermark ", and its signature value is 32 bytes, totally 256, embed altogether 50 times, and setting threshold value is 95%.If have to exceed 40 times and can be verified, represent that watermark information is " watermark " really.We have carried out many groups of experiments subsequently, change the watermark information embedding.
| Watermark information | Embed number of times | Correct extraction time | Success rate |
| watermark | 50 | 49 | 98% |
| waterimage | 45 | 45 | 100% |
| iptvimage | 50 | 49 | 98% |
| abcdefg | 60 | 59 | 98.3% |
| chinese | 60 | 60 | 100% |
The scheme of the visible embodiment of the present invention can meet the correct extraction of watermark, and the filmstrip that we exchange other for does test of the same type, watermark success rate still 98% and more than.
One of ordinary skill in the art will appreciate that: accompanying drawing is the schematic diagram of an embodiment, the module in accompanying drawing or flow process might not be that enforcement the present invention is necessary.
One of ordinary skill in the art will appreciate that: the module in the equipment in embodiment can be described and be distributed in the equipment of embodiment according to embodiment, also can carry out respective change and be arranged in the one or more equipment that are different from the present embodiment.The module of above-described embodiment can be merged into a module, also can further split into multiple submodules.
By the device of the embodiment of the present invention and system, by loseing digital watermarking, to be embedded into detailed process and the preceding method embodiment of Streaming Media similar, repeats no more herein.
In sum, the embodiment of the present invention is based upon public-key cryptosystem, on Streaming Media and image disposal system, set up a reliable Mathematical Modeling by statistical method, realize the visual experience in the case of not affecting user, transmitting terminal is embedded into the signature value of watermark information in Streaming Media by public-key cryptosystem, and receiving terminal is by signature value dissection process from Streaming Media of watermark information.Realize the reviewing and protecting of copyright of Streaming Media.And due to the introducing of signature/verification system, make the information embedding become the strong evidence of the copyright side of having, can solve existing dispute over copyright the problem of vaild evidence cannot be provided.
The embodiment of the present invention has been owing to having adopted a set of tight Mathematical Modeling, makes Streaming Media recipient carry out simple cutting or image stretch to video and processes and can not destroy the watermark information embedding in Streaming Media.
The embodiment of the present invention had both been supported the embedding of the invisible watermark of local video file, also supported the Real-time embedding of the invisible watermark of live broadcast stream media.
The above; only for preferably embodiment of the present invention, but protection scope of the present invention is not limited to this, is anyly familiar with in technical scope that those skilled in the art disclose in the present invention; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (10)
1. by loseing digital watermarking and be embedded into a method for Streaming Media, it is characterized in that, comprising:
Utilize public-key cryptosystem to generate a pair of PKI and private key, use described private key to the processing of signing of the data of watermark information, obtain signature value;
By the mark of files in stream media and described PKI, signature value with carry out cascade, by Hash calculation, obtain the watermark embedded location in the each non-key frame of described files in stream media;
According to the information embedding method of setting, transmitting terminal is embedded into the data of described watermark information on the watermark embedded location in described each non-key frame successively.
2. according to claim 1ly it is characterized in that loseing digital watermarking and be embedded into the method for Streaming Media, the described private key of described use, to the processing of signing of the data of watermark information, obtains signature value, comprising:
Use hash algorithm to carry out Hash processing to the binary data of described watermark information, obtain cryptographic Hash, utilize described private key to the cryptographic Hash processing of signing, obtain signature value.
3. according to claim 2ly will lose digital watermarking and be embedded into the method for Streaming Media, it is characterized in that, described by the mark of files in stream media and described PKI, signature value with carry out cascade, pass through Hash calculation, obtain the watermark embedded location in the each non-key frame of described files in stream media, comprising:
The mark of described PKI, signature value and files in stream media is carried out to cascade, then carries out hash calculating, obtain character string S:
S＝Hash(PubKey|Signature|FileID)
Described PubKey represents PKI, and described Signature represents signature value, and described FileID represents file identification;
Calculate the watermark embedded location P in the each non-key frame P frame of described files in stream media according to described S:
P[t]=(S[t]/N+a, S[t] modN+a) t=1,2 ..., M, formula 2
Described M represents the figure place of described character string S, described S[t] represent the t position of described character string S, described N is for setting positive integer, described a is according to mathematical statistical model and definite parameter value, described P[t] be t non-key frame.
4. according to claim 3ly will lose digital watermarking and be embedded into the method for Streaming Media, it is characterized in that, described according to the information embedding method of setting, transmitting terminal is embedded into the data of described watermark information on the watermark embedded location in described each non-key frame successively, comprising:
At transmitting terminal, the U component of each the non-key frame P frame to files in stream media carries out discrete cosine transform conversion, obtains matrix U
1, U
2..., U
m, wherein, matrix U
1corresponding first P frame P[1], matrix U
2corresponding second P[2] frame, matrix U
mcorresponding M P[M] frame;
For first P frame P[1 of described files in stream media], the P[1 that calculates of design] watermark embedded location be (a, b), when first binary data of the described watermark information embedding when needs is 1, work as U
1[a, b] >=0, U
1[a, b] remains unchanged, and works as U
1[a, b] <0, U
1[a, b] negate; When first binary data of described watermark information embedding when needs is 0, work as U
1[a, b] >=0, U
1[a, b] negate, works as U
1[a, b] <0, U
1[a, b] remains unchanged;
For second P frame P[2 of described files in stream media], the P[2 that calculates of design] watermark embedded location be (c, d), when second binary data of the described watermark information embedding when needs is 1, work as U
2[c, d] >=0, U
2[c, d] remains unchanged, and works as U
2[c, d] <0, U
2[c, d] negate; When second binary data of described watermark information embedding when needs is 0, work as U
2[c, d] >=0, U
2[c, d] negate, works as U
2[c, d] <0, U
2[c, d] remains unchanged;
Repeat above-mentioned processing procedure, until described M the binary data that needs the described watermark information embedding is inserted in M P frame of described files in stream media successively.
5. according to the method that is embedded into Streaming Media by loseing digital watermarking described in claim 1 to 4 any one, it is characterized in that, described method also comprises:
At receiving terminal, according to the identical processing procedure of transmitting terminal, by Hash calculation, obtain the watermark embedded location in the each non-key frame of described files in stream media according to the mark of described files in stream media and described PKI, signature value;
According to the watermark embedded location in the each non-key frame of the information embedding method of described setting and described files in stream media, parse the watermark information embedding on the watermark embedded location of each non-key frame of described files in stream media.
6. by loseing digital watermarking and be embedded into a device for Streaming Media, it is characterized in that, comprising:
Signature value acquisition module, for utilizing public-key cryptosystem to generate a pair of PKI and private key, uses described private key to the processing of signing of the data of watermark information, obtains signature value;
Watermark embedded location acquisition module, for by the mark of files in stream media and described PKI, signature value with carry out cascade, by Hash calculation, obtains the watermark embedded location in the each non-key frame of described files in stream media;
Embed processing module, for according to the information embedding method of setting, the data of described watermark information are embedded into successively on the watermark embedded location in described each non-key frame at transmitting terminal.
7. according to claim 6ly will lose digital watermarking and be embedded into the device of Streaming Media, it is characterized in that:
Described signature value acquisition module, specifically for using hash algorithm to carry out Hash processing to the binary data of described watermark information, obtains cryptographic Hash, utilizes described private key to the cryptographic Hash processing of signing, and obtains signature value.
8. according to claim 7ly will lose digital watermarking and be embedded into the device of Streaming Media, it is characterized in that:
Described watermark embedded location acquisition module, specifically for the mark of described PKI, signature value and files in stream media is carried out to cascade, then carries out hash calculating, obtains character string S:
S＝Hash(PubKey|Signature|FileID)
Described PubKey represents PKI, and described Signature represents signature value, and described FileID represents file identification;
Calculate the watermark embedded location P in the each non-key frame P frame of described files in stream media according to described S:
P[t]=(S[t]/N+a, S[t] modN+a) t=1,2 ..., M, formula 2
Described M represents the figure place of described character string S, described S[t] represent the t position of described character string S, described N is for setting positive integer, described a is according to mathematical statistical model and definite parameter value, described P[t] be t non-key frame.
9. according to claim 8ly will lose digital watermarking and be embedded into the device of Streaming Media, it is characterized in that:
Described embedding processing module, specifically at transmitting terminal, the U component of each the non-key frame P frame to files in stream media carries out discrete cosine transform conversion, obtains matrix U
1, U
2..., U
m, wherein, matrix U
1corresponding first P frame P[1], matrix U
2corresponding second P[2] frame, matrix U
mcorresponding M P[M] frame;
For first P frame P[1 of described files in stream media], the P[1 that calculates of design] watermark embedded location be (a, b), when first binary data of the described watermark information embedding when needs is 1, work as U
1[a, b] >=0, U
1[a, b] remains unchanged, and works as U
1[a, b] <0, U
1[a, b] negate; When first binary data of described watermark information embedding when needs is 0, work as U
1[a, b] >=0, U
1[a, b] negate, works as U
1[a, b] <0, U
1[a, b] remains unchanged;
For second P frame P[2 of described files in stream media], the P[2 that calculates of design] watermark embedded location be (c, d), when second binary data of the described watermark information embedding when needs is 1, work as U
2[c, d] >=0, U
2[c, d] remains unchanged, and works as U
2[c, d] <0, U
2[c, d] negate; When second binary data of described watermark information embedding when needs is 0, work as U
2[c, d] >=0, U
2[c, d] negate, works as U
2[c, d] <0, U
2[c, d] remains unchanged;
Repeat above-mentioned processing procedure, until described M the binary data that needs the described watermark information embedding is inserted in M P frame of described files in stream media successively.
10. by loseing digital watermarking and be embedded into a system for Streaming Media, it is characterized in that, comprising:
Device and receiving terminal as described in claim 6 to 9 any one, described device is transmitting terminal,
Described receiving terminal, for according to the identical processing procedure of transmitting terminal, by Hash calculation, obtains the watermark embedded location in the each non-key frame of described files in stream media according to the mark of described files in stream media and described PKI, signature value;
According to the watermark embedded location in the each non-key frame of the information embedding method of described setting and described files in stream media, parse the watermark information embedding on the watermark embedded location of each non-key frame of described files in stream media.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106780280A (en) * | 2016-11-30 | 2017-05-31 | 深圳Tcl数字技术有限公司 | Digital watermarking encryption method and device |
| CN106804003A (en) * | 2017-03-09 | 2017-06-06 | 广州四三九九信息科技有限公司 | Video editing method and device based on ffmpeg |
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